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Showing content from https://doc.rust-lang.org/nightly/std/fs/fn.create_dir.html below:

create_dir in std::fs - Rust

pub fn create_dir<P: AsRef<Path>>(path: P) -> Result<()>

Creates a new, empty directory at the provided path

This function currently corresponds to the mkdir function on Unix and the CreateDirectoryW function on Windows. Note that, this may change in the future.

NOTE: If a parent of the given path doesn’t exist, this function will return an error. To create a directory and all its missing parents at the same time, use the create_dir_all function.

This function will return an error in the following situations, but is not limited to just these cases:

• User lacks permissions to create directory at path.
• A parent of the given path doesn’t exist. (To create a directory and all its missing parents at the same time, use the create_dir_all function.)
• path already exists.

use std::fs;

fn main() -> std::io::Result<()> {
    fs::create_dir("/some/dir")?;
    Ok(())
}

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